Ventilator



J. L. OLSON. V'ENTILATOR. APPLICATION FILED APR.28| 19I9.

1,362,033, Patented Dec. 14, 1920.

PATENT OFFICE.

JOHN L. OLSON, OF LOGANSPORT, INDIANA.

VENTILATOR.

Application filed April 28, 1919.

To all whom it may concern:

Be it known that 1, JOHN L. OLSON, a citizen of the United States, residing at Logansport, in the county of Cass and State of indiana, have invented certain new and useful Improvements in Ventilators, of which the following is a specification.

This invention relates to ventilators and more particularly to an apparatus having various improvements in construction, proportion and arrangement of parts whereby a more thorough ventilating of the building upon which the device is mounted will be obtained.

One of the primary objects of the invention is to improve the detail construction of an apparatus of this character whereby a greater quantity of stagnant and impure air will be caused to pass through the ventilator without materially increasing the size and dimensions thereof.

The invention further aims to provide a ventilator having movable and stationary parts adapted to intercommunicate and constructed so that the passage-ways will have materially increased areas whereby increased quantities of air may pass through the ventilator.

Another object of the invention is to provide a ventilator having a revolving body of frusto-conical formation, the same being equipped with a large outlet opening or vent having an areagreater than the area of the opening through which the air is emitted into the revolving body.

ther objects of the invention will more readily appear upon consideration of the following description and accompanying drawings, in which Figure 1 is a perspective view of the apparatus constructed in accordance with my invention.

Fig. 2 is a central longitudinal section.

Fig. 3 is a detail section through a portion of the upper end of the ventilator.

Fig. 4 is a detail section through a portion of the lower end of the ventilator.

Fig. 5 is a transverse section through one of the louver plates.

Referring to the drawings, wherein is illustrated the preferred form of my invention, in which like characters of reference indicate like or corresponding parts throughout the several views, the supporting sleeve 1 is of cylindrical formation and Specification of Letters Patent.

Patented Dec. 14, 1920.

Serial No. 293,127.

is adapted to be mounted upon a pipe or standard connected to the building upon whlch the ventilator is used and in this c onnection it should be pointed out that the apparatus may be mounted on the top of a chimney or smoke stack and will increase the draft and generally increase the efficiency of the chimney or stack.

The cylindrical sleeve 1, intermediate its ends is provided with an annular bead 2 formed by an annular depression 8 on the inner surface of the sleeve 1. Attached to the sleeve above the bead 2 on the exterior thereof, is a louver flange 4 which includes the attaching ring 5 riveted by the members 6, to the sleeve 1 and from this ring the louver flange 4 flares outwardly as shown to advantage in Figs. 2 and 4. This louver flange 4 may be at any desired angle and has its upper marginal edge approximately in the same plane as the upper marginal edge of the sleeve 1. From the outer marginal edge of the louver flange 4 a downwardly extending angularly disposed rim 7 pro ects, the free marginal edge of which carries a lip 8 which is disposed vertically as shown in Fig. 4. This completes the louver flange construction and it will be noted that the annular space around the supporting sleeve 1 between the same and the louver flange 4, will catch the moisture and the same may be drained from this annular space through the drain openings 9 provided in the sleeve 1 above the annular bead 2.

Supporting arms 10 extend radially across the upper end of the sleeve 1 and have their adjacent ends disposed near the center of the sleeve and are connected to a supporting bearing 11 which has a recess to receive the lower end of a central shaft 12. The outer ends of the supporting arms 10 are rigidly fixed, but are engaged with the lower ends of the struts 13 which have their lower ends interposed between the flanges 14 of the arms 10 and the inner surface of the sleeve 1, these parts being firmly and rigidly fixed and held together by the fastening elements 15. The upper ends of the struts 13 support a bearing plate 16 through which the shaft 12 is extended and this bearing plate supports the complementary members of a ball hearing or roller bearing 17 and upon which is supported the rotatable portion of the ventilator as will hereinafter appear. Rotatably mounted on the shaft 12 is a collar 18, the lower end of which is engaged with the roll bearings 17 and is supported thereby. This collar has a flared flange 19 to which are attached the supporting arms 20. These arms support the rotatable hood 21 which comprises the substantially frusto-conical member 22 having the square mouth 23 at one side. The lower end of the member 22 is considerably larger in diameter than the annular lip as shown to advantage in Figs. 2 and 4 and the lower marginal edge is turned or rolled to form an annular bead 23 to give the resired rigidity and finish to the hood. The upper end of the hood, by virture of its tapered formation, is considerably less in diameter than the lower end thereof, but slightly greater than the interior diameter of the sleeve 1. The mouth or outlet 23 of the hood is of square formation, this being formed by the straight side walls 24 and the straight top wall 25, the side walls 24, as shown to advantage in Figs. 1 and 2 being laterally projected from the curved wall of the hood and outwardly therefrom for the desired distance. The square opening or mouth thus formed is of such size as to give a greater area to the mouth than the area of any lateral plane across the hood or sleeve.

The mouth 23 is provided with a plurality of louverplates disposed at an angle as shown and each of which comprises the inclined portions 26 having the downwardly projecting front flange 27 and the up wardly projecting inner or upper flange 28 with an outwardly directed lip 29 as shown in Fig. 5. The outer marginal edge of the wall 25 is turned downwardly to form lip 31.

One of the arms 20 is secured to the hood as indicated at 32 and another of the arms 20 is secured tothe bottom surface of the wall 25. The rotatable hood is thereby sup- 45 ported by the arms 20 which are connected to the flared flange 19 of the collar 18 and since the latter rests upon the ball bearings and embraces the'shaft 12,'i t will be obvi ous that the hood may be freely rotated and by virtue of the central ball bearings, the slightest wind will swing the hood. on the shaft.

The upper marginal edge of the hood is provided with a louver rim which is smaller than the lower louver flange 4 but which is integrally formed with the upper end of the hood and projects outwardly and downwardly as indicated at 33 and has its lower marginal edge provided with a short annular lip 34. One of the arms 20, preferably the one which is attached at 32 to the hood, is provided with an upward extension 35 which is attached to and supports the coping 36. This coping is of conical formation anddirectly beneath its apex it is provided with a bearing 37 and this coping is also secured as indicated at 3 to the wall 25 so that the coping rotates with the hood but provides an annular space indicated at 39 between the marginal edge of the coping and the louver rim 33.

A vane 40 is secured to the coping and acts to receive the force of the wind whereby the hood may be turned to properly direct the mouth of the device 23 in the di rection toward which the wind is blowing in the manner well known in the art to which this apparatus pertains.

It should be pointed out, that it is important that the mouth 23 of the hood be at least four times larger in area than the area of the sleeve 1 through which the air passes into the ventilator from the building, but it will be observed that this greater area is secured without increasing the size of the mouth structure as compared with the general proportions of the ventilator, the rotatable hood being merely tapered sufficiently to cause its lower marginal edge to be spaced away from the mouth whereby P a passage-way a1 is formed.

In use, the device will be mounted on an outlet vent pipe or smoke stack, and the will follow the course indicated by the various arrows indicated in Fig. 2. Entering the sleeve 1, the air is conducted therethrough and some of the air is directed downwardly and outwardly through the passage-way 41, the louver flange, projecting toward the lower marginal edge of the hood, causing the restricted passageway 11 to create a draft at this point. whereby the air is drawn downwardly and outwardly through the bottom of the hood, by means of the passage-wayetl. Some of the air is caused to ee-directed upwardly through. the hood and out through the mouth 23, the currents of air being directed downwardly by virtue of the inclined positions of the plates 26. The greater area of the mouth will cause the air to rapidly pass from the hood and therefore a draft of considerable force is created in the sleeve 1 and a rapid exhaust of the air is thereby obtained. By virtue of the inclined position of the louver plates in the mouth, rain and snow will be prevented from passing in to the hood and this is also prevented by the vertical flanges '27 and 28 and the forwardly directed lips 29. some of the air will continue upwardly and contact with the coping 36, but by virtue of the passage-way 39, this air will be rapidly emitted from the hood, being directed downwardly by the conical coping and outthat the hood is perfectly balanced and will freely swing when the current of air strikes the vane 4.0.

I claim:

1. A ventilator comprising a sleeve having supporting arms attached thereto, a central shaft supported by the said supporting arms, and provided approximately intermediate its ends with a bearing, struts carried by the sleeve and supporting the said bearing, a rotatable hood provided with supporting arms, equipped with a collar engaging the said bearings whereby the said hood is freely rotatable on the said shaft and the said bearing, the said hood having its lower end of a diameter greater than the diameter of the said sleeve, the upper end of the hood being restricted in diameter, a coping supported above the hood and attached thereto, the said sleeve having a lower louver flange projecting toward the lower marginal edge of the said hood, the upper end of the said hood having an outwardly downwardly directed louver rim be tween the outer marginal edge of the said coping and the said upper end of the hood, and an outlet passage-way formed in the said hood.

2. A ventilator comprising a sleeve of cylindrical formation, a shaft supported by the sleeve and disposed centrally with respect thereto, a hood, a. bearing mounted on the shaft, means connected to the sleeve to support the said bearing approximately intermediate the ends of the said shaft, supporting arms having a collar engageable with the bearings to maintain the arms in rotatable supported position, the hood supported by the said arms and of substantially frusto-conical formation, the said sleeve having an upwardly directed angularly disposed louver flange, the lower end of the said hood being of greater diameter than the said louver flange, the latter being equipped at its marginal edge with a downwardly directed rim terminating in an annular lip disposed vertically, the upper end of the said hood having an outwardly and downwardly directed louver rim, a coping attached to and movable with the said hood, and having its outer marginal edge spaced from the said louver rim to provide an annular passageway, the said hood being provided with laterally projecting walls forming a relatively large mouth communicating with the interior of the said hood.

3. A Ventilator comprising a sleeve of cylindrical formation, a shaft supported by the sleeve and disposed centrally with respect thereto, a hood, a bearing mounted on the shaft, means connected to the sleeve to support the said bearing approximately intermediate the ends of the said shaft, supporting arms having a collar engageable with the bearings to maintain the arms in rotatable supported position, the hood supported by the said arms and of substantially frusto-conical formation, the said sleeve having an upwardly directed aiwularly disposed louver flange, the lower end of the said hood being of greater diameter than the said louver flange, the latter being equipped at its marginal edge with a downwardly directed rim terminating in an annular lip disposed vertically, the upper end of the said hood having an outwardly and downwardly directed louver rim, a coping attached to and movable with the said hood, and having its outer marginal edge spaced from the said louver rim to provide an annular passage'way, the said hood being provided with laterally projecting walls forming a relatively large mouth communicating with the interior of the said hood, the said mouth having inclined louver plates connected to the said walls and equipped with flanges at their longitudinal marginal edges, the uppermost flange in each louver plate being provided with an outwardly directed lip.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN L. OLSON. WVitnesses:

HAROLD PETERSON, VILLIAM J. BETHKE. 

